diff --git a/gatchat/gatchat.c b/gatchat/gatchat.c
index 6f1aa721..6e3a267e 100644
--- a/gatchat/gatchat.c
+++ b/gatchat/gatchat.c
@@ -1037,18 +1037,6 @@ gboolean g_at_chat_shutdown(GAtChat *chat)
 	return TRUE;
 }
 
-gboolean g_at_chat_set_syntax(GAtChat *chat, GAtSyntax *syntax)
-{
-	if (chat == NULL)
-		return FALSE;
-
-	g_at_syntax_unref(chat->syntax);
-
-	chat->syntax = g_at_syntax_ref(syntax);
-
-	return TRUE;
-}
-
 gboolean g_at_chat_set_disconnect_function(GAtChat *chat,
 			GAtDisconnectFunc disconnect, gpointer user_data)
 {
diff --git a/gatchat/gatchat.h b/gatchat/gatchat.h
index 58c7155f..4c3ab07d 100644
--- a/gatchat/gatchat.h
+++ b/gatchat/gatchat.h
@@ -48,8 +48,6 @@ void g_at_chat_unref(GAtChat *chat);
 
 gboolean g_at_chat_shutdown(GAtChat *chat);
 
-gboolean g_at_chat_set_syntax(GAtChat *chat, GAtSyntax *syntax);
-
 gboolean g_at_chat_set_disconnect_function(GAtChat *chat,
 			GAtDisconnectFunc disconnect, gpointer user_data);